Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario descargar pdf (Pagina 13)

Introducing the BASIC Module

Chapter 2

2–3

One RS-423A/232C/RS-422 compatible serial communications port

(PERIPHERAL port), supporting bi-directional XON/XOFF software

handshaking and RTS/CTS, DTR, DSR, DCD hardware handshaking for

interfacing to printers and commercial asynchronous modems. You can

change the peripheral port configuration using a CALL 30. (Refer to

Section 5.8.1). Default values are: 1 start bit, 1 stop bit, 8 bits/character,

no parity, handshaking off and 1200 baud. The baud rate is jumper

selectable (300 to 19.2 K bps). (Refer to Section 3.2.4 titled,

“Configuration Plugs”).

Interface to the 1771 I/O rack backplane to support block-transfer.

Wall clock/calendar with battery back-up available for program access.

Battery replacement without removing the module from the I/O rack.

All power derived from the backplane (1.5 A).

Multiple BASIC modules can reside in the same I/O rack and function

independently of each other.

Your module runs BASIC language programs in an interactive mode

through the dumb terminal/programming port interface, or on power-up.

The execution of these programs allows a direct interface with

programmable controller ladder programs.

Your module uses the following devices and features:

terminal for programming, editing, system commands, displaying data

and interactive program dialog

serial port for report generation output, upload/download to

1770-SA/SB Recorder

PLC-2, PLC-3 and PLC-5 data table reads and writes using

block-transfer

We provide routines to use both the real-time clock and the

wall-clock/calendar. The wall-clock time base is seconds.

2.3

Hardware Features

(continued)

2.4

Software Features

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario Pagina 13